2.2 Animal tissues, organs and organ systems

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Question 50
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A long-term study investigated the relative risk of developing a cardiovascular condition based on sodium intake (measured in grams per week) for two groups of adults:

  • Group A (solid line): Low physical activity
  • Group B (dashed line): High physical activity

A relative risk of 1.0 represents the baseline risk of the reference group.

A graph plotting Relative Risk of developing cardiovascular disease on the y-axis against Sodium consumed in grams per week on the x-axis. The x-axis ranges from 0 to 10 grams per week, with major gridlines every 1.0 units and minor gridlines every 0.2 units. The y-axis ranges from 0 to 6, with major gridlines every 1.0 units and minor gridlines every 0.1 units. Two curves are shown starting at x = 2.0. The solid curve representing Group A starts at (2.0, 1.2), passes through (5.0, 2.4), and reaches (8.0, 4.8). The dashed curve representing Group B starts at (2.0, 1.0), passes through (5.0, 1.5), and reaches (8.0, 2.5).

a.

An individual in Group A consumes 5.0 g5.0\text{ g}5.0 g of sodium per week. If they increase their physical activity levels to join Group B while maintaining their sodium intake at 5.0 g5.0\text{ g}5.0 g per week, calculate the percentage decrease in their relative risk of developing cardiovascular disease. Give your answer to one decimal place.

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b.

A serving of canned soup contains 0.8 g0.8\text{ g}0.8 g of sodium. An individual in Group B eats 101010 servings of canned soup each week and consumes no other sodium. Calculate their total weekly sodium consumption and use the graph to find their relative risk of developing cardiovascular disease.

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2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems